Alnico 5磁石の熱膨張に対する時効処理の影響

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タイトル別名
  • The Influence of Aging Treatment on the Dilatation in Alnico 5
  • Alnico 5 ジシャク ノ ネツ ボウチョウ ニ タイスル ジコウ ショリ ノ エイキョウ

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The change of dilatation during aging process in Alnico 5 was observed and discussed. The result was compared with the previous result of the measurement on the temperature dependence of electric resistance and it was found that the result supports the previous conclusion. The outstanding changes observed were that of contraction at 350∼550°C, the great expansion at 550∼650°C and the change of expansion at 700∼800°C; they are changed by the aging condition. Thus, it was concluded that there are two different kinds of transformation mechanism during aging process of Alnico 5. The one occurs during aging process below about 600°C, and may be a transformation something like order-disorder transition. The other is a precipitation which occurs during aging process above 650°C. It seems that the former mai- nly causes the best magnetic properties.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (7), 479-484, 1961

    公益社団法人 日本金属学会

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